A wide area network (WAN) is a computer network that covers a wide geographic area such as a city, a country, or even the world. WANs can be used to connect sites over a long distance, such as connecting an office in New York to an office in London. Most of the large organizations and service providers make good use of WANs.
A WAN connects various devices and Local Area Networks (LANs) over long distances, usually using public switched telephone networks (PSTN), dedicated leased lines, or satellite links. WANs are used to connect different types of devices, including routers, switches, and computers. There are a variety of WAN topologies that are used to connect sites. The most common type of WAN topology is a point-to-point WAN. You will learn about it further in this guide of CCNA course series.
Other types of WAN topologies include multipoint WANs, mesh WANs, and virtual private LANs (VPLANs). This guide will provide a comprehensive overview of WAN topologies, including the different types of WAN topologies and their benefits.
In the previous blog of our CCNA 200-301 series , we talked about the LAN Architecture. I recommend you go through it before you jump to this blog.
If we expand the term WAN, it stands for Wide Area Network (WAN). A WAN is a computer network that extends over a large geographic area such as between cities, countries, etc. So, WANs are used to connect geographically separate WANs.
For example, if a company has an office in New York, India, and Toronto, each of them is a Local Area Network (LAN) and the connections between them form a Wide Area Network (WAN).
Although the Intenet can be called a WAN, WANs are typically used by large organizations, such as universities and corporate enterprises, as well as service providers. A WAN can be used to connect multiple nodes and can be used for file sharing and communication.
Virtual Private Networks (VPNs) can be used to create private WAN connections over public/shared networks like the Internet.
WANs typically use various protocols and technologies, including packet switching and circuit switching.
There are several different types of topologies in WAN architectures. The four main types of WAN topologies are:
Let us cover each one of them one by one.
The most common type of WAN topology in WAN architecture is a point-to-point WAN. Let’s learn about it in detail.
WANs offer several benefits, including improved access and availability of resources, enhanced scalability, improved performance, and higher levels of security.
WANs also allow organizations to access centralized resources, such as databases and networks. This allows for improved scalability as an organization grows.
Additionally, WANs allow for bandwidth upgrades as the need arises. WANS are typically secured and encrypted, providing an extra layer of security for an organization’s data and resources.
WANs also make it easier to access centralized data and resources, improving performance.
Setting up a WAN involves several steps, including choosing the best architecture for the application, configuring the hardware, and configuring the software. When choosing the best architecture, it is important to consider the following:
Once the best architecture is chosen, the hardware needs to be configured and the software needs to be installed. This includes setting up routers and switches, configuring the network settings, securing the network, and setting up firewalls.
Once a WAN is set up, it is important to ensure that it is managed and secured properly. This includes making sure that the routers and switches are updated with the latest security patches, as well as monitoring traffic and restricting access to the network.
Firewalls can be used to restrict access to the network and can be configured to alert users if suspicious activity is detected. Additionally, antivirus software can be used to detect and remove malicious software.
Users should also be trained on how to properly use the WAN and how to recognize potential security threats.
WAN architecture is an important part of any organization’s information technology infrastructure. This guide provides a comprehensive overview of WAN topologies used in WAN architecture, including the different types of WAN topologies available, how to set up a WAN, and how to manage and secure a WAN.
By understanding the different types of WANs and how to set up, manage, and secure them, organizations can ensure that their WANs are secure and that they are getting the most out of their WANs.
Happy Learning
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